MTK Offline Render - User Guide

A batch rendering tool for REAPER projects (.rpp files).

Table of Contents

• Quick Start
• Installation
• Loading Projects
• Render Sources
• Audio Settings
• Output Settings
• Batch Mode
• MP4 Video Export
• Wildcards Reference
• Troubleshooting

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Quick Start

1. Launch MTK Offline Render
2. Drag a folder containing .rpp files into the window
3. Select your REAPER executable path
4. Click 🚀 Render

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Installation

Requirements

• Windows 10/11
• REAPER (any recent version)

Setup

1. Extract the downloaded archive to any location
2. Run MTKOfflineRender.exe
3. On first launch, the tool will auto-detect REAPER installation paths

If REAPER is not detected automatically, click the ... button next to the REAPER dropdown to manually select reaper.exe.

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Loading Projects

Method 1: Drag and Drop

Drag a folder containing .rpp files directly onto the application window.

Method 2: Select Folder

Click 📁 Select Folder and choose a folder. The tool will scan all subfolders recursively.

Managing the File List

Button	Function
Check All	Select all projects for rendering
Uncheck All	Deselect all projects
Exclude Selected	Remove highlighted rows from the list
Clear List	Remove all projects from the list

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Render Sources

The Source column determines what content will be rendered from each project.

Mode	Description
Region	Render each region as a separate file
Selected Items	Render selected items via master
Default	Use the project's existing render settings

Region Mode

When using Region mode:

1. Click on a project row to view its regions in the Details panel below
2. Check/uncheck individual regions to include or exclude them
3. The Selection column shows the count (e.g., "5/8" means 5 of 8 regions selected)

Selected Items Mode

Renders items that are marked as selected in your REAPER project. Use this when you've pre-selected specific items in REAPER before saving the project.

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Audio Settings

Each project can have individual audio settings, or you can use Batch Mode to apply the same settings to all projects.

Available Parameters

Setting	Options
Format	WAV, MP4
Rate	44100, 48000, 88200, 96000, 176400, 192000 Hz
Bits	8, 16, 24, 32 Int, 32 FP, 64 FP
Channels	Mono, Stereo, 4, 6, 8
Resample	Sinc 192pt, 384pt, 512pt, 768pt, r8brain
Speed	Full-Speed, 1x Offline, Online, Offline Idle, 1x Idle

Note: When MP4 format is selected, the Bits setting is disabled (not applicable to video export).

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Output Settings

Project Settings Panel

When you select a single project row (without Batch Mode), the Project Settings panel appears:

Output Path

• Use Project Output (checked): Uses the output path defined in the .rpp file
• Use Project Output (unchecked): Specify a custom output directory

Pattern

• Use Project Pattern (checked): Uses the filename pattern defined in the .rpp file
• Use Project Pattern (unchecked): Define a custom filename pattern using wildcards

Click Wildcards to insert variables like $region, $project, etc.

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Batch Mode

Batch Mode allows you to apply identical settings to all projects at once.

Enabling Batch Mode

1. Check Enable Batch Mode in the Batch Mode panel
2. Configure all settings in one place
3. Individual column settings in the table will be hidden

When to Use Batch Mode

Scenario	Recommended Mode
All projects need the same output format	✅ Batch Mode
Each project needs different sample rates	❌ Individual settings
Rendering a large number of similar projects	✅ Batch Mode

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MP4 Video Export

Select MP4 as the output format to export video files.

Fixed Video Parameters

Parameter	Value
Resolution	1920 × 1080
Frame Rate	60 fps
Video Codec	H.264
Video Bitrate	10,000 kbps
Audio Codec	AAC
Audio Bitrate	256 kbps

Note: These video parameters are fixed and cannot be customized in the current version.

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Wildcards Reference

Use these wildcards in your filename pattern:

Regions

Wildcard	Description
$region	Region name
$regionnumber	Region number
$marker	Marker name

Items

Wildcard	Description
$item	Item name
$itemnumber	Item number
$itemnotes	Item notes
$take	Take name

Time

Wildcard	Description
$year	Year (4-digit)
$month	Month (2-digit)
$day	Day (2-digit)
$hour	Hour (24h)
$minute	Minute
$second	Second

Others

Wildcard	Description
$project	Project name
$track	Track name
$tempo	Project tempo
$timesig	Time signature
$channels	Number of channels

Separator

Choose a separator to automatically insert between wildcards:

• None: $region$project
• Underscore: $region_$project
• Dash: $region-$project

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Troubleshooting

REAPER not found

Symptom: The REAPER dropdown is empty or shows an invalid path.

Solution: Click the ... button and manually navigate to your reaper.exe file. Common locations:

• C:\Program Files\REAPER (x64)\reaper.exe
• D:\Program Files\REAPER (x64)\reaper.exe

Render fails immediately

Symptom: Render starts but fails with an error code.

Possible causes:

1. The .rpp file is corrupted or has an incompatible format
2. REAPER is already running with the same project open
3. The output path is invalid or not writable

Solution: Try opening the project in REAPER manually to verify it loads correctly.

Temporary files left behind

Symptom: You see files with _mtktmp_ in the filename.

Explanation: These are temporary render files. The tool automatically cleans them up on startup. If they persist, you can safely delete them manually or move them to the Recycle Bin.

No regions found

Symptom: The Details panel shows no regions for a project.

Solution: Ensure your REAPER project has regions defined (not just markers). In REAPER, regions have a start and end point, while markers are single points.

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Version Information

To check the current version and for updates:

1. Click the ℹ️ button in the toolbar
2. The About dialog shows your version and checks for updates automatically

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Feedback & Support

If you encounter issues or have feature requests, please visit the GitHub Issues page.

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MTK Offline Render v0.2.2